Portable post-driver.



PATENTED AUG. 30, 1904.

G. H. HEISER.

PORTABLE PUST DRIVER.

APPLICATION FILED MAY 20, 1904.

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PATENTED AUG. 30, 1904.

Y G. R. HRISRR. PORTABLE POST DRIVER.

APPLIGATION FILED MAY 20, 1904.

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Winessesf PATENTBD AUG. 30, 1904, G. H. HEISER.

PORTABLE POST DRIVER.

APPLICATION FILED MAY 20, 1904.

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Witnesses Patented August 30, 1904.

PATENT Trice.

GEORGE H. HEISER, OF DAYTON, OHIO.

PORTABLE POST-DRIVER.

SPECIFICATION forming' part of Letters Patent NO. 768,853, dated August 30, 1904.

To CLM w/Lom, t muy concern:

Be it known that I, GEORGE H. HEIsER, a citizen of the United States, residing' at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Portable Post or Stake Drivers; and l do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being' had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

This invention relates to a machine for driving well-piping, posts, stakes-such, for example, as tent-stakes, Sac.

The invention comprises the new and useful features hereinafter described and claimed.

Prcceding a detail description of the invention, reference is made to the accompanying drawings, of which- Figure 1 is a side elevation of the machine.

2 is afront elevation of the driving mechanism. Fig. 3 is a top plan view of Fig. 2. Fig. et is a vertical sectional elevation. Fig. is a perspective view of details. Fig. 6 is a detail view of features of the devices shown in Fig. 5. Fig. 7 is a detail of the bearingplates.

ln a detail description of the invention similar reference characters indicate corresponding parts.

The various mechanisms for driving the posts or stakes are carried upon a truck, as shown in Fig. 1, therefore may be transported to the various points with facility. Any suitable means for furnishing the necessary power may be provided. In the present instance a gas or gasolene motor 1 is employed and which is mounted on a suitable part of the truck 2.

3 is an upright casing mounted in the rear of the truck and in which the driving-weight 4; is movable in the operations of driving the post or stake 5. The casing 3 is open at the bottom, as indicated by 6, in order to permit of the post or stake being placed in an upright position in alinement with the driving-weight 4L.

7 designates an arm which is bolted to the top of the driving-weight and occupies a central position within the casing 3.

8 and 9 designate two rollers which grip the arm 7 at predetermined times to elevate vthe driving-weight and which release said arm when the weight is elevated to a proper height, and thereby permits said weight to drop by gravity in contact with the top of the post or stake. The roller 9, as well as the companion roller 8, is mounted in journal-boxes 10 and 11 in a bearing-plate 12, the journalboxes 10 having a fixed connection with the plate 12, while the journal-boxes 11 have a sliding connection with said plate 12 by means of a dovetail slide 13, which is a part of the journal boxes 11, the said dovetail slide moving in a corresponding way in the bearing-plate 12. It will thus be seen that the roller 8 has amovement toward and from the roller 9, which is an intermittent movement, in order that the said rollers may grip the arm 7 in elevating the driving-weight 4 and may release said arm, as hereinbefore indicated. The dovetail slide 13 is connected with a bracket liby means of bolts 15, which project rigidly from said slide and are loosely connected with the arms of the bracket 111, said bolts having cushion-springs 16, which provide a proper means for yieldingly maintaining the bracket 14 in position. The shiftable roller 8 drives theroller 9 by gear-wheels 17 and 18, mounted upon the shafts of said rollers.

19 designates a lever which is pivoted to a projecting arm of the bracket 14 and has an adjustable fulcrum 28. The lower end of the lever 19 has a roller 21, that rides upon the periphery of a cam 20. The said cam 2O is splined upon driving shaft 22, which is mounted in journal-boxes 23 on standards 24E, said standards being supportable upon the portable truck 2. The shiftable roller 8 is driven from the shaft 22 by means of chain and chain-wheels 25, 26, and 27, respectively, said wheels being on the power-shaft 22 and the shaft of said roller 8.

Y 29 designates a driving-gear on shaft 22, which is driven from the motor 1 through lpinion 30 and intervening transmission-gear The cam 2() is shiftable upon the shaft h v means of a shifting lever or arm 32,

7hich engages a circumferential groove 33 on one end of said cam 20. The other end of said shifting-arm 32 is rigidly connected to a slidable rod 34, which is supported in bearingarms 35, that aremounted upon the front side of the casing 3. 3G designates a rigid arm on an end of said sliding' rod 34.

3T is a rock-shaft operated by hand by means of a handpiece This rod is loosely supported in bearings 39, projecting from a side of the easing 3, and the said shaft terminates in a crank-arm 40, which is pivoted to the arm on the sliding rod 34. From the above it will be seen that by rocking the shaft 3T in either direction the cam 2O will be shifted in one or in the other direction upon the shaft 22. f

1t will be noted from the several views of the drawing's that the cam 2O has a hollowed shape, the smallest circumference being' at the middle portion of said cam. Vhen the roller 21 on arm 19 is riding upon this smallest circumference, as shown in Figs. 2 and 3, the roller 8 is moved forwardly with the sliding plate 13 to release theweight-arm 7. 2O is another cam portion of the cam 20, which when the roller 21 is riding' over the portion having' the greatest circumference the shiftable roller 8 is moved to a position to cause said roller and roller 9 to firmly grip the weight-arm T. This end of the cam 20 is in a position to receive the roller 21 when the machine is in operation or when the weightarm 7 is having reciprocating movement to raise and drop the driving-weight. Then the roller is riding upon the greatest circumference 22H of the am, the rollers 8 and 9 are gripping the weight-arm? and the weight is being elevated. Willen the flat surface 20 of the cam receives the roller 21, the lever 19, owing to the roller 21 following' the surface 20', shifts the gripping-roller forwardly to release said arm 7, and this operation is repeated.

After the operation of driving a stake or post completed and preparatory to transporting the machine to a position to operate upon another post or stake the driving-weight 4 is elevated andsuj'iported in an elevated position as follows and by the following mechanism: The shifting-arm 32 is operated from the rocker-shaft 37 to shift the cam 2O to a position that removes the highest periphery 2OH away from the roller 21 and brings the portion of the cam 2() indicated by 2OX in a position to ride against said roller, thus causing the driving-weight 4 to elevate until it engages stop or projection 40. The stop or projection 40/ projects through a slot 41 in the side of the casing and is rigidly secured to a sliding member 42 or is a part of a sliding' member 42, which is slidably mounted on the front of the casing by means of a guide-bolt 43, which penetrates a slot in said slide. The elevation of this slide, due to the engagement of the weight with the projection 40, actnates a dog 44, which is pivoted to the front side of the casing and projects through a slot in said casing in a position to engage the lower end of the weight and to thus hold said weight in an elevated position without depending on any other means for so holding said weight. The dog 44 is thus thrown inwardly by an arm 46, which is fast to the lower end of the sliding member 42 and engages the lower end of the dog to throw said dog inward, as before indicated. This sliding member 42 has a V- shaped cam 42 thereon, which is carried upwardly by said slide and when moving upwardly engages an arm 47, which is [xed to the sliding' rod 34, and thus shifts the cam 2() to a position that brings the roller 21 on the arm 19 in position at the center of said cam` 20. The center of said cam being thesmallest circumference of said cam enables the arm 19 to move upon its fulcrum to an extent that separates the gripping-roller' 8, and thus releases the weight-arm 7. The machine is then in a position to be transported, and the entire weight of the driving-weight 4 is supported by the dog 44. Then the machine is started again, the dog 44 is released from engagement with the driving-weight by operating the l'iand-lever 48, which is on one end of the lshaft 49, upon which the dog 44 is pivoted. The weight is thus given its initial drop, after which the cam 2() is shifted, by means of the shifting-arm 32, as hereinbefore described, to bring the operating end of said cam in the path of the roller 21.

It is frequently necessary to diminish the force of the final driving stroke of the driver in order that the post or stake may not be driven beyond the desired point. This contingency is provided for by manually-operative means, which lessens the linal stroke and which consists of an arm 50, bearing upon its outer end a roller 51, which engages the inner side of the lever 19, there being a plate 52 placed upon said lever for this purpose. The arm 50 is fast upon a shaft 53, journaled in brackets 54 on the front side of the casing, This shaft 53 has a hand-lever connected thereto, by which it is rocked to engage the roller 51 with said lever, and thus move inwardly the gripping-roller 8 to engage the weight-arm 7 sufiiciently to retard or check the force of the weight. This operation is carried out immediately after the weight is dropped.

Having described my invention, I claimw 1. In a post-driver, the combination with a portable support, of an upright casing mounted thereon, a driving-weight within said. casing, a rigid member projecting from said casing, gripping-rollers adapted to grip and release said rigid member, a cam having' three working surfaces, means interposed between TOO IIO

said cam and one of the gripping-rollers whereby the said roller is controlled in its position, and means for twisting said cam, substantially as set forth.

2. The combination with an upright casing, a driving-weight in said casing, a rigid arm to which said weight is attached, grippingrollers engaging and releasing said arm to elevate and drop the weight, slidable bearings upon which one of said gripping-rollers is mounted, a cam having three working surfaces, a lever connected with said slidable bearings and actuated by said cam, and means for shifting said cam, substantially as set forth.

3. In a post or stake driver, the combination with an upright casing, a driving-weight movable in said casing, an arm to which said driving-weight is attached, gripping-rollers engaging' said arm to elevate and release said driving-weight, slidable bearings in which one of said gripping-rollers is mounted, a lever connected to said slidable bearings, a cam acting upon said lever to slide said bearings to positions for the gripping-rollers to grip and release said arm, and means for shifting said cam laterally, substantially as set forth.

el. 1n a post or stake driver, the combination with a portable support, an upright easing mounted upon said support, a drivingweight movable in said casing, an arm to which said driving-weight is attached, gripping-rollers adapted to engage and release)A said arm and thereby elevate and drop said driving-weight, slidable bearings upon which one of said rollers is mounted, a lever, yielding connection between said lever and said slidable bearings, a cam having three working' surfaces, said cam engaging said lever to maintain the gripping-rollers.in operative relation and out of operative relation, and shifting devices for moving' said cam into and out of operative relation with said gripping-rollers substantiallyy as set forth.

5. In a post or stake driver, the combination of an upright casing, a driving weight or hammer within said casing, means forelevating and releasing' said weight, means for holding' said weight temporarily in` an elevated position, said meansbeing operated by the weight upon said weight reaching the upper limit of the movement thereof, substantially as set forth.

6. In a post or stake driver, an upright casing, a driver movable within saideasing, means for elevating and dropping said driver, a dog adapted to hold said driver temporarily in an elevated position, a sliding member on the exterior of said casing, a stop projecting from said sliding member in the path of the ascending driver and whereby said sliding member is elevated when the driver engages said stop, and means on said sliding member adapted to actuate said dog' to throw the latter in a position below the driver, substantially as set forth.

7. In a post or stake driver, an upright casing, a weight or driver movable in said casing, a rigid arm projecting from said weight or driver, gripping-rollers adapted to engage and release said arm to lift 4and drop said Weight or driver, a slidable bearing upon which one of said gripping-rollers is mounted, a lever yieldingly connected to said slidable bearing, a camhaving three working surfaces engaging said lever to maintain the grippingrollers in and out of operative relation with said cam, and manually-operative means controlling said lever. to diminish the force of said weight or driver in its iinal stroke, substantially as set forth.

In testimony whereof I affix my signature in presence of two Witnesses.

GEORGE H. HEISER.

Witnesses:

R. J. MoCAR'rY, JOHN M. Nur'r. 

